Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa850d8644344ec5…

MALICIOUS

PDF

70.7 KB Created: 2021-02-23 09:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 13b36a69d6e80fdab475b7d349399e97 SHA-1: b003350d2604da7387850cd6dfc79526c2b759b2 SHA-256: aa850d8644344ec53ff6eb88cab0380b671e685e562ccc00e21131554a6aae8e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/wix?keyword=apk+adventure+journey In PDF document text
    • https://cdn.sqhk.co/xekemini/jj8UieB/nosonure.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/nosetedi.pdfIn PDF document text
    • http://sedogowisu.iblogger.org/36722677804.pdfIn PDF document text
    • https://gazodajatara.weebly.com/uploads/1/3/2/7/132712558/wirofosumove.pdfIn PDF document text
    • https://cdn.sqhk.co/rogudokives/zqiethh/sudikatamab.pdfIn PDF document text
    • https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/gijeregarumox.pdfIn PDF document text
    • https://pigulanofalo.weebly.com/uploads/1/3/1/4/131406379/levulotavetezadene.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sokobob.epizy.com/busefafovunazo.pdfIn PDF document text
    • http://pidawuz.epizy.com/ace_2018_test_series_mechanical.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/bible_commentary_application.pdfIn PDF document text
    • http://sabuxixu.epizy.com/9585693574.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/jekopilokulonena.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/ieee_template_article.pdfIn PDF document text
    • http://xatufagenis.rf.gd/how_to_connect_turtle_beach_stealth_500p_to_pc.pdfIn PDF document text
    • http://xefujexomige.epizy.com/shiv_bhakti_audio_song.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B1 5036 bytes
SHA-256: 0ec826b1112b124fcd06df111b61784e3423c15a55079f144524ba8666e3eab6
font_01_sfnt_off0000d5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F9 10192 bytes
SHA-256: f430a15391c8ec9bafa3ca3a520dbb8bca2382fb19bb6ffa1ce025e2a0fcca3c
font_02_sfnt_off0000f928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073